The Bearcat Two-Four TS Thin Scan handheld, dual band scanners come in three versions. Individual channels may be locked out. Scan rate is 8 channels per second. This radio operates from four AAA cells (not included) or from external 6 VDC. Audio output is 100mw. The miniature (A-135 type) crystals are not supplied. The top panel has an AUTO - MAN rocker switch, earphone jack (mini), and external antenna jack (sub-mini). Supplied with flexible, screw-in antenna. The left panel has volume and squelch knobs plus an External Power Jack and a Charging jack.